Investigating the effect of reed fibers on concrete engineering characteristics made of sediments of Hormak River (North of Zahedan) and its use in Reinforcement of structures against earthquakes

The purpose of this study is to investigating the effect of reed fibers on concrete engineering characteristics made of sediments of Hormak River(North of Zahedan)and its use in Reinforcement of structures against earthquakes.In this study, in order to investigate the effect of reed fibers on the engineering properties of concrete, the ratio of water to cement in all designs is constant and equal to 195 to 410 and experiments have been performed on 5 samples containing fibers and without fibers, before determining the optimal amount of each From the mentioned fibers to strengthen the concrete, the results of the necessary tests on fresh and hardened concrete were examined. In this study, in addition to mixing straw fibers with concrete,laboratory methods such as Compressive and tensile strength were used to confirm the accuracy of the results and the importance of selecting suitable materials at low cost in a short time before the concrete mixing project. The results show that the addition of straw fibers to concrete has increased the compressive strength in concrete samplesComparing the results of this test in ordinary concrete and fiber reinforced concrete, showed that this increase in strength at the ages of 7 to 28 days has increased only in samples S2 and S3 and is Similar to the typical concrete example isS1, While in S4 and S5 samples, which were samples of three-row fibers,there is a large decrease in compressive strength.Adding straw fibers initially increases the compressive and tensile strengths, but over time reduces these resistances.